[Bug 1925010] Re: shim-signed 15.4 does not boot on EFI 1.10 systems

[Alexander Browne]

I tested on a MacBookPro9,2 (13-Inch, Mid-2012).

0. I clean installed from the 21.04 release image
(http://releases.ubuntu.com/21.04/ubuntu-21.04-desktop-amd64.iso). FWIW
I made my usual choices

        - Minimal installation

	- Download updates…
	- Install third-party software…

        - Erase disk and install Ubuntu

1. Restarting after the install, the computer showed a gray screen and
never booted up as per the original issue.

2. I booted again from the install media, opened the live session, did
the workaround steps from #14 and booted into the Ubuntu 21.04
installation.

3. I enabled -proposed and ran `sudo apt install shim-signed` to upgrade
that package to version 1.47+15.4-0ubuntu2.

4. I tested booting several times – cold boots, restarts and holding the
option key to load the Mac boot menu – and the computer always boots
normally.

5. FWIW I also then ran `sudo apt full-upgrade` to install the other
available updates and the computer had continued to boot normally.

** Tags removed: verification-needed verification-needed-hirsute
** Tags added: verification-done-hirsute

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https://bugs.launchpad.net/bugs/1925010

Title:
  shim-signed 15.4 does not boot on EFI 1.10 systems

Status in shim package in Ubuntu:
  Fix Released
Status in shim-signed package in Ubuntu:
  Fix Released
Status in shim source package in Hirsute:
  Fix Committed
Status in shim-signed source package in Hirsute:
  Fix Committed

Bug description:
  The latest update on Hirsute made the MacBook Air from 2012
  unbootable.

  It could be recovered by booting a 20.04 live CD, downloading 20.04's
  shim package and overwriting the files in EFI/ubuntu and EFI/BOOT with
  the files shipped in the shim package.

  Machines Affected (not comprehensive):
  MacBookPro8,2
  MacBookAir5,2

  [Test case]
  For a system that has applied the workaround from https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1925010/comments/14 and is bootable:

  - install shim-signed from hirsute-proposed
  - reboot
  - verify that the system now boots without workaround

  This test case applies only to hirsute.  For all other series, there
  has been no regression, and because this is the same binary across all
  series, no other SRU testing is required.

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